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Finding the Fourth Proportional to 191,409.74, 287,174.95 and 90,203.70

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Solution

The fourth proportional to 191,409.74, 287,174.95 and 90,203.70 is: 135,333.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,409.74 : 287,174.95 = 90,203.70 : x
  2. Step 2: Convert to fraction form
    191,409.74/287,174.95 = 90,203.70/x
  3. Step 3: Cross multiply
    191,409.74x = 287,174.95 × 90,203.70
  4. Step 4: Simplify right side
    191,409.74x = 25,904,243,037.32
  5. Step 5: Solve for x
    x = 25,904,243,037.32/191,409.74
  6. Step 6: Final answer
    x = 135,333.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.